Police on Tuesday questioned a taxi driver who may have driven the main suspect away from the area of last week`s deadly attack in Bangkok, as forensic experts struggle to unearth vital evidence in Thailand`s worst ever bombing.

Gang suspects have confessed to killing 43 missing Mexican students, burning their bodies for 14 hours and tossing their charcoal-like remains in a river, authorities said, in a case causing national revulsion.

Oscar Pistorius tearfully recalled the final hours spent eating and chatting with girlfriend Reeva Steenkamp before he shot her dead on Valentine`s Day 2013, during a second emotional day of testimony today.

Oscar Pistorius is expected to take the stand as his trial resumes this week in a defence relying on forensic experts and South Africa`s notoriously high crime rate to explain how and why he shot dead his girlfriend.

Two forensic experts, who had provided scientific support and services in the probe into the December 16 gangrape-cum-murder case, were cross-examined by the defence counsel for four adult accused before a Delhi court.

Altogether four persons were arrested so far in connection to the gruesome murder of four persons, three of them women, at Thakurpukur in the south-western outskirts of the city, the police said on Sunday.